Example usage for org.apache.commons.lang.reflect ConstructorUtils getAccessibleConstructor

Introduction

In this page you can find the example usage for org.apache.commons.lang.reflect ConstructorUtils getAccessibleConstructor.

Prototype

public static Constructor getAccessibleConstructor(Class cls, Class[] parameterTypes) 

Source Link

Document

Returns a constructor given a class and signature.

Usage

From source file:org.diffkit.diff.sns.DKAbstractSheet.java

/**
 * throws IllegalArgumentException if it's not able to find a handler in
 * availableSheetClasses_ for file_//  w w  w .  j av  a2 s  . c  om
 */
@SuppressWarnings("unchecked")
public static DKSheet constructSheet(File file_, String requestedName_, boolean isSorted_, boolean hasHeader_,
        boolean validateLazily_, Class<DKSheet>[] availableSheetClasses_) throws NoSuchMethodException,
        IllegalAccessException, InvocationTargetException, InstantiationException {
    DKValidate.notNull(file_);
    DKValidate.notEmpty((Object[]) availableSheetClasses_);
    Class<DKSheet> handlerClass = getHandlerClassForFile(file_, availableSheetClasses_);
    LOG.debug("handlerClass->{}", handlerClass);
    if (handlerClass == null)
        throw new IllegalArgumentException(
                String.format("Couldn't find handler in availableSheetClasses_->%s for file_->%s",
                        Arrays.toString(availableSheetClasses_), file_));
    Constructor<DKSheet> constructor = ConstructorUtils.getAccessibleConstructor(handlerClass,
            IMPLEMENTOR_CONSTRUCTOR_PARAM_TYPES);
    LOG.debug("constructor->{}", constructor);
    if (constructor == null)
        throw new IllegalArgumentException(
                String.format("Couldn't find Constructor in handlerClass->%s for constructor parm types->%s",
                        handlerClass, Arrays.toString(IMPLEMENTOR_CONSTRUCTOR_PARAM_TYPES)));
    Object[] constructorArgs = { file_, requestedName_, Boolean.valueOf(isSorted_), Boolean.valueOf(hasHeader_),
            Boolean.valueOf(validateLazily_) };
    return constructor.newInstance(constructorArgs);
}

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From source file:org.forgerock.openam.guice.GuiceModuleCreator.java

/**
 * Finds and returns the Constructor to use to create the Guice module.
 *
 * Note: There must be one and only one public no-arg constructor for the Guice module.
 *
 * @param clazz The Guice module class./* www.  j a v a 2s .  c  o  m*/
 * @param <T> The Guice module class type.
 * @return The public no-arg constructor.
 * @throws NoSuchMethodException If no public no-arg constructor exists in this class.
 */
private <T> Constructor<T> getConstructor(Class<T> clazz) throws NoSuchMethodException {

    Constructor constructor = ConstructorUtils.getAccessibleConstructor(clazz, new Class[] {});

    if (constructor != null) {
        return constructor;
    } else {
        throw new NoSuchMethodException(
                String.format("No public zero-arg constructor found on %s", clazz.getCanonicalName()));
    }
}

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From source file:org.mili.core.logging.DefaultLogger.java

/**
 * Static method to create a new logger from class clazz.
 *
 * @param clazz the class.//from   w w  w.j a  v a 2  s . c  om
 * @return logger.
 */
public static Logger create(Class<?> clazz) {
    String adapterClassname = System.getProperty(PROP_ADAPTERCLASS, Log4jAdapter.class.getName());
    Class<?> cls;
    try {
        cls = Class.forName(adapterClassname);
    } catch (ClassNotFoundException e) {
        throw new IllegalStateException(e);
    }
    Constructor<Logger> constructor = ConstructorUtils.getAccessibleConstructor(cls, Class.class);
    try {
        return constructor.newInstance(clazz);
    } catch (Exception e) {
        throw new IllegalStateException(e);
    }
}

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